By making a deal with a legendary Mudskipper you are granted the abilities of a god almost.

Infinite Combo

At Lvl 3 when attacking enemies with unarmed strike 4 times per long rest you can cause them to not be able to use reactions against you for one turn, you can also use one of the charges to give yourself one extra attack when using fury of blows.

Flood in Lower Erisia

At Lvl 3 by taking 1 full action you can make two copies of yourself with 1/4 of your Hp rounded up, these clones can only use unarmed strikes and can't use flurry of blows, but they do the same unarmed damage as you and go on the same turn as you. You also only need to use a bonus action to control these clones, if not they will take the dodge action. The amounf of copies is increased by 2 at Lvl 13.

Necroskipper

At lvl 6 when killing a creature you drain the life force from them, when this happens for every one creature you kill you gain one "Infinite Combo" charge and when killing a creature who has a CR equal to half your level rounded up or higher you gain a "Flood in Lower Erisia" charge.

Corruptedskipper

At Lvl 6 you can take a bonus action 2 times every long rest to give yourself resistance to all bludgeoning, piercing, and slashing, 15 temporary hit points, and extra damage equal to your proficiency bonus. This form lasts for one minute.

Ki Flare

At Lvl 11 you can choose to spend 3 Ki points to summon a flaming ball to throw 60 Ft, making an enemy make a Dex save or take 8d8 Fire damage on a fail and half on succeed, you can also choose to disperse your ball into your fist making you take 1d4 fire damage every turn but doing 2d4 fire damage every unarmed strike you hit, this ends when you take a bonus action to disable it or you get knocked.

Final Airforce

At Lvl 17 if below 1/4 of your max HP you can take 2 full actions and 3/4 of your max ki points to charge up a devasting blow with a 200 Ft and 50 Ft line aoe, all attacks you take are at disadvantage and are halved as the mudskipper god's spirit fends of attackers, when the attack is unleashed the targets must make a Dex save of 23, if failed the foes take 15d10 force damage and be blasted 25 Ft back, if failed you are still sent back 25 Ft but half the damage instead, if reduced to 0 hit points you instantly die. ( Bypasses Res )